UPDATE 1-Biden admin still undecided on Minnesota copper mine project -Vilsack Reuters 3 hrs ago (Adds background on project) By Andrea Shalal and Ernest Scheyder May 5 (Reuters) - U.S. Agriculture Secretary Tom Vilsack said on Wednesday that the White House has not decided on the fate of the Twin Metals copper mining project in Minnesota, as it works to balance economic growth and strong opposition from environmentalists. Vilsack's comments were among the first from a senior official in President Joe Biden's administration on the proposed underground mine, which environmentalists fear would permanently mar the Boundary Waters Canoe Area Wilderness on the U.S.-Canada border.